This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A251090 #4 Nov 30 2014 16:50:05 %S A251090 1,2,3,2,3,10,21,22,3,14,33,34,39,10,51,26,57,58,21,2,69,70,3,82,87, %T A251090 22,93,94,33,10,111,14,39,118,123,62,129,130,141,142,21,74,51,154,159, %U A251090 10,57,86,177,178,183,46,21,190,201,202,69,26,213,214,219,110 %N A251090 Squarefree kernel of A098548(n). %C A251090 a(n) = A007947(A098548(n)). %H A251090 Reinhard Zumkeller, <a href="/A251090/b251090.txt">Table of n, a(n) for n = 1..10000</a> %o A251090 (Haskell) %o A251090 a251090 = a007947 . fromIntegral . a098548 %Y A251090 Cf. A007947, A098548, A251089. %K A251090 nonn %O A251090 1,2 %A A251090 _Reinhard Zumkeller_, Nov 30 2014